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Influence of impurity scattering on the critical temperature of superconductors with a partial gap in the electron spectrum

Abstract

The influence of the scattering potential of nonmagnetic and magnetic impurities on the critical superconducting transition temperatureT c is considered for superconductors with either a completely or partially dielectric electron spectrum. It is shown thatT c rises with increasing concentration of nonmagnetic impurities, i.e., the Anderson theorem is violated in such systems. Magnetic impurity scattering lowersT c. However, this reduction is weakened compared to usual superconductors, due to the presence of the dielectric gap on the Fermi surface.

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Gabovich, A.M., Shpigel, A.S. Influence of impurity scattering on the critical temperature of superconductors with a partial gap in the electron spectrum. J Low Temp Phys 51, 581–599 (1983). https://doi.org/10.1007/BF00683230

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Keywords

  • Critical Temperature
  • Magnetic Material
  • Electron Spectrum
  • Fermi Surface
  • Magnetic Impurity